Camera system and camera body

Abstract

A camera system having a camera body and an interchangeable lens is made more convenient to use. A camera system 1 includes an interchangeable lens unit 2 and a camera body 3 . A body microcomputer 10 of the camera body 3 decides whether or not the interchangeable lens unit 2 is compatible with moving picture mode on the basis of lens information about the interchangeable lens unit 2 . If the interchangeable lens unit 2 is not compatible with moving picture mode, the body microcomputer 10 prevents the operation of an imaging sensor 11 from being set to moving picture mode.

The invention claimed is: 
     
       1. A camera system, comprising:
 an interchangeable lens unit having an imaging optical system configured to form an optical image of a subject, a focus adjuster configured to optically adjust the focus state of the optical image, and a lens controller configured to control the operation of the focus adjuster; and 
 a camera body having an imaging unit configured to convert the optical image of the subject into an image signal and configured to acquire an image of the subject, a focus detector configured to detect the focus state of the optical image by contrast detection method on the basis of the image signal, and a body controller configured to control the operation of the imaging unit and with which information can be exchanged with the lens controller, 
 wherein the lens controller has lens information related to the interchangeable lens unit, 
 the lens information includes information on whether or not a method for driving the focus adjustment of the interchangeable lens unit is compatible with wobbling, 
 the body controller, based on the lens information, is configured to decide whether or not the interchangeable lens unit is compatible with wobbling, so that a focusing performance can be set based on the decision made by the body controller. 
 
     
     
       2. The camera system according to  claim 1 ,
 wherein if the body controller decides that the interchangeable lens unit is not compatible with wobbling, the body controller is configured to set the speed of a focusing to the speed at which the focusing by contrast detection method can be performed. 
 
     
     
       3. The camera system according to  claim 2 ,
 wherein the body controller is configured to set the focusing performance to the optimal for each combining the camera body with the interchangeable lens unit. 
 
     
     
       4. The camera system according to  claim 1 ,
 wherein the body controller is configured to set the focusing performance to the optimal for each combining the camera body with the interchangeable lens unit. 
 
     
     
       5. A camera body used in a camera system along with an interchangeable lens unit having an imaging optical system configured to form an optical image of the subject, a focus adjuster configured to optically adjust the focus state of the optical image, and a lens controller configured to control the operation of the focus adjuster, the camera body comprising:
 an imaging unit configured to convert an optical image of the subject into an image signal and configured to acquire an image of the subject; 
 a focus detector configured to detect the focus state of the optical image by contrast detection method on the basis of the image signal; and 
 a body controller configured to control the operation of the imaging unit and with which information can be exchanged with the lens controller, 
 wherein the lens controller has lens information related to the interchangeable lens unit, 
 the lens information includes information related to whether or not a method for driving the focus adjustment of the interchangeable lens unit is compatible with wobbling, 
 the body controller is configured to decide whether or not a method for driving the focus adjustment of the interchangeable lens unit is compatible with wobbling based on the lens information, so that a focusing performance can be set based on the decision made by the body controller. 
 
     
     
       6. The camera body according to  claim 5 ,
 wherein if the body controller decides that the interchangeable lens unit is not compatible with wobbling, the body controller is configured to set the speed of a focusing to the speed at which the focusing by contrast detection method can be performed. 
 
     
     
       7. The camera body according to  claim 6 ,
 wherein the body controller is configured to set the focusing performance to the optimal for each combining the camera body with the interchangeable lens unit. 
 
     
     
       8. The camera body according to  claim 5 ,
 wherein the body controller is configured to set the focusing performance to the optimal for each combining the camera body with the interchangeable lens unit.